The internal model code for the Mercedes-Benz S-Class produced from 2013 to 2020 is W222.
The W222 was the sixth generation of the S-Class. It was officially unveiled in May 2013 and entered production in June of that year, replacing the W221 generation. Production ended in September 2020 when the W223 S-Class arrived.
W222 usually identifies the standard-wheelbase sedan, while the closely related long-wheelbase sedan carries the V222 code. The generation also spawned the C217 coupe and A217 convertible, as well as high-luxury Maybach versions. This is why model-code questions can be trickier than they first appear: one S-Class generation may use several related internal designations.
The main distractors represent neighboring generations. W140 belongs to the 1990s S-Class, W221 preceded the W222 from 2005 to 2013, and W223 is the successor introduced for the 2020s.